16064-21-4Relevant articles and documents
Targeting the Hemopexin-like Domain of Latent Matrix Metalloproteinase-9 (proMMP-9) with a Small Molecule Inhibitor Prevents the Formation of Focal Adhesion Junctions
Alford, Vincent M.,Kamath, Anushree,Ren, Xiaodong,Kumar, Kunal,Gan, Qianwen,Awwa, Monaf,Tong, Michael,Seeliger, Markus A.,Cao, Jian,Ojima, Iwao,Sampson, Nicole S.
, p. 2788 - 2803 (2017)
A lack of target specificity has greatly hindered the success of inhibitor development against matrix metalloproteinases (MMPs) for the treatment of various cancers. The MMP catalytic domains are highly conserved, whereas the hemopexin-like domains of MMPs are unique to each family member. The hemopexin-like domain of MMP-9 enhances cancer cell migration through self-interaction and heterointeractions with cell surface proteins including CD44 and α4β1 integrin. These interactions activate EGFR-MAP kinase dependent signaling that leads to cell migration. In this work, we generated a library of compounds, based on hit molecule N-[4-(difluoromethoxy)phenyl]-2-[(4-oxo-6-propyl-1H-pyrimidin-2-yl)sulfanyl]-acetamide, that target the hemopexin-like domain of MMP-9. We identify N-(4-fluorophenyl)-4-(4-oxo-3,4,5,6,7,8-hexahydroquinazolin-2-ylthio)butanamide, 3c, as a potent lead (Kd = 320 nM) that is specific for binding to the proMMP-9 hemopexin-like domain. We demonstrate that 3c disruption of MMP-9 homodimerization prevents association of proMMP-9 with both α4β1 integrin and CD44 and results in the dissociation of EGFR. This disruption results in decreased phosphorylation of Src and its downstream target proteins focal adhesion kinase (FAK) and paxillin (PAX), which are implicated in promoting tumor cell growth, migration, and invasion. Using a chicken chorioallantoic membrane in vivo assay, we demonstrate that 500 nM 3c blocks cancer cell invasion of the basement membrane and reduces angiogenesis. In conclusion, we present a mechanism of action for 3c whereby targeting the hemopexin domain results in decreased cancer cell migration through simultaneous disruption of α4β1 integrin and EGFR signaling pathways, thereby preventing signaling bypass. Targeting through the hemopexin-like domain is a powerful approach to antimetastatic drug development.
HETEROARYL DERIVATIVES AS SEPIAPTERIN REDUCTASE INHIBITORS
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Paragraph 00174-00178, (2017/05/31)
Inhibitors of sepiapterin reductase of formula (I) or (I'), wherein the substituents are defined as in the claims, and uses of sepiapterin reductase inhibitors in analgesia, treatment of acute and chronic pain, anti-inflammation, and immune cell regulation are disclosed.
The identification of clinical candidate SB-480848: A potent inhibitor of lipoprotein-associated phospholipase A2
Blackie, Josie A.,Bloomer, Jackie C.,Brown, Murray J. B.,Cheng, Hung-Yuan,Hammond, Beverley,Hickey, Deirdre M. B.,Ife, Robert J.,Leach, Colin A.,Lewis, V. Ann,Macphee, Colin H.,Milliner, Kevin J.,Moores, Kitty E.,Pinto, Ivan L.,Smith, Stephen A.,Stansfield, Ian G.,Stanway, Steven J.,Taylor, Maxine A.,Theobald, Colin J.
, p. 1067 - 1070 (2007/10/03)
Modification of the pyrimidone 5-substituent in clinical candidate SB-435495 has given a series of inhibitors of recombinant lipoprotein-associated phospholipase A2 with sub-nanomolar potency. Cyclopentyl fused derivative 21, SB-480848, showed an enhanced in vitro and in vivo profile versus SB-435495 and has been selected for progression to man.
